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Process of dehydrating nitrocellulose and reducing the fire risk thereof

US 1,398,911 A · Inventors: SEEL PAUL C

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Overview

The published document from the USPTO: abstract, claims, description and drawings. Open it full size

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Read the whole patent

Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents.

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Why it's free to use

  • Granted November 29, 1921. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by November 29, 1938.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledAugust 9, 1920
GrantedNovember 29, 1921
Term endedNovember 29, 1938
Application number—
Classification (CPC)C06B21/0091
Length2 pages

Timeline

Timeline From USPTO dates

192119231925192719291931193319351937Application filedAug 9, 1920Patent grantedNov 29, 1921Term endedNov 29, 1938

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

Everything on this page comes from the USPTO record linked above.